((t/(6400+2*x))((3*x+t)/(6400+2*x)))(15.8^2)/((x-t)/(6400+2*x))((4800-x-t)/(6400+2*x))=574.4

and

((x-t/(6400+2*x))((3*x+t)/(6400+2*x)))(15.8^2)/((1600-x)/(6400+2*x))((4800-x-t)/(6400+2*x))=0.262

Solve for x and t. I need help.